Virtual Reality Modeling Language (VRML) is a

The latest version of VRML is VRML 97. The Web 3D Consortium has since developed X3D as the successor to VRML 97. X3D contains all the nodes defined in VRML, but has some key advantages. Unfortunately, few CAD applications support the export of X3D files.

There are several locations that include good tutorials for learning more about VRML. They include:

A good reference to all the nodes is located at http://accad.osu.edu/~pgerstma/class/vnv/resources/info/AnnotatedVrmlRef/ch3-301.htm